Maybe considering the old controversy about her? Like, Jynx is like the only pokemon I can think of who flatout got redesigned in later gens and it made her miss out on an evolution like Electabuzz and Magmar had iirc
Potentially, although odd they would skip a normal evolution and then go back to the drawing board with a mega and then scrap that too for the same prior reasons.
But that might be the case given it could have been in ORAS if cut for a different reason.
We know Gamefreak has some weird logic and takes on the fanbase and controversies.
Such as stating that the reason XY had less pokemon was because the west was big mad about black and white not having enough old pokemon in it.
Which is kind of stupid and I don’t think that’s really the case.